Machinery FMEA – is used to analyze low-volume specialty machinery (equipment and tools), that allows for customized selection of component parts, machine structure, tooling, bearings, coolants, etc.
Focuses on designs that improve the reliability and maintainability of the machinery for long-term plant usage.
Considers preventive maintenance as a control to ensure reliability.
Considers limited volume, customized machinery where large scale testing of a number of machines is impractical prior to production and manufacture of the machine.
Considers parts that can be selected for use in the machine, where reliability data is available or can be obtained before production use.
Concept FMEA – is used to analyze concepts for systems and subsystems in the early stages.
Focuses on potential failure modes associated with the functions of a concept proposal caused by design decisions that introduce deficiencies.
Includes the interaction of multiple systems, and interactions between the elements of a system at concept stages.
Would apply to all new machinery concepts that have never been done before, all new plant machinery layout, new architecture for machinery, etc.)
System FMEA – is used to analyze planned / proposed systems.
Intended to transform an operational need into a description of system performance parameters and system configuration through the use of an interactive process of functional analysis, synthesis, optimization, design, test, and evaluation.
Design FMEA – is used to analyze products, high volume tools or standard machines, machine components, standard production tooling, etc., before they are released to production.
Focuses on potential failure modes of products caused by design deficiencies.
Focuses on parts that can be prototyped and tested or modeled before high volume production of the product is launched.
Process FMEA – is used to analyze manufacturing and assembly processes.
Focuses on potential product failure modes caused by manufacturing or assembly process deficiencies.
Useful in analyzing process steps that can influence the design of machinery, including selection of appropriate tooling and machinery component parts.